Serving spoon



FIG. 1 is a perspective view of a serving spoon showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof; and,

FIG. 4 is a rear elevation view thereof.

The broken line aspects herein are for the purpose of illustrating portions of the serving spoon and form no part of the claimed design. 

CLAIM The ornamental design for a serving spoon, as shown and described. 